I think you have a very good point, and one the term 'Sitzfleisch' kinda misses. The point is to be actually productive, not just to be seen working long hours

I think you have a very good point, and one the term 'Sitzfleisch' kinda misses. The point is to be actually productive, not just to be seen working long hours - the 'ass in seat' mentality. The former actually actually achieves something, the latter mostly wastes your time, but is a low-effort way to stay in a job where management has a hard time measuring actual progress. It's a pathological way to game a system that can only reward perceived effort.